Drilling-machine



(No Model) J. SULLIVAN, Jr.. DRILLING MAGHINE.

No. 527,462. Patented Oct. 16,1894.

UNITED STATES PATENT OFFICE.

JEREMIAH SULLIVAN, JR, OF DUDLEY, PENNSYLVANIA.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,462, dated October 16, 1894.

Application than 5,1893. Serial 110.473.072. (Nomodeh) useful improvements in drilling machines united above and below by bridges or which are secured to said side pieces in any suit- I having referencemore especially to machines employed in quarrying and mining, and has for its object the provision of simple and efficient means for changing the feed for the more effective operation on hard or soft material.

The invention comprises the details of construction, combination and arrangement of parts, substantially as hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings:Figure 1 is a view in side elevation. Fig. 2 is a plan view of the operative parts. 1 Figs. 3, 4., and 5 are detail sectional views. Fig. 6 is a view of the two-part nut. Fig. 7. is a transverse sectional view on the line 00-00, Fig. 2.

. Referring to the drawings, A designates the supporting frame consisting of side posts a able manner. From the lowermost bridge a. projects a spur a while a threaded rod or bolt or works ina corresponding threaded sleeve.

a of the upper bridge, said rod or bolt being pointed on its upper end and provided with a wheel of. In practice the spur a and pointed rod or belt a engage the floor and roof of the drift the same being adjusted to various heights byturning wheel a Bis the frame containing the operative portions of the machine, the projecting sides I) of said frame fitting in recesses or cut-away portions b of side-bars a, whereby said frame may be positioned at various heights. A shaft 0 is journaled in bearings b of frame B and on each end thereof is a crank handle b A large gear wheel b is secured on one end of shaft 0 inside the side bars 12 of frame B and bearings b while a smaller gear wheel b is secured on the opposite end of said shaft,

said small gear wheel also being inside the side-bars b Both of these gear wheels are provided with sleeves b extended through bearings b and gear-wheel b is adj ustably secured on the shaft 0 by a set-screw b 1 D is a gear wheel having an elongation d fitting in a sleeve (1' of frame B said elongation having a flange (1 so as to prevent lateral movement of said gear-wheel, which latter is provided with a longitudinal bore for the passage of the spindle d Said spindle is screw threaded and has longitudinal grooves d in which fit spurs or projections d of gear wheel D whereby the spindle is rotated by the rotation of said gear-wheel.

E is a carriage mounted on frame B and the same is provided with flanges e designed to slide on the side bars of said frame. The

' movement of the carriage is limited by a pin 6 inserted in openings of frame B. I In a sleeve 6 of carriage E is designed to rotate thereducedportion of an elongation of a pinion c in which is cut a groove e to receive theend of a screw a which prevents lateral movement of said pinion independent of the carriage. A portion of the elongation of pinion e adjacent to sleeve 6 is cut out to form a hole or opening designed to receive a pin e, which is intended to prevent rotation of said pinion. The pinion e is made hollow and the walls of said hollowed portion are provided with two grooves e designed to receive ridges c3 of a nut F. This not is formed in two parts f, f, hinged together at f and provided with a female screw-thread f The spindle (i is provided with a square socket f? for the reception of the squared end of bit f which latter is provided with four cutting edges f by which means I am enabled to out more rapidly and efiectively.

In operation wheel b meshes with the pinion D and gives it about three rotations to one; while gear 19 meshes with pinion e and revolves the same in the direction of the motion of the spindle. It will thus be seen that these wheels and pinions being in engagement with each other the advance of'the spindle d is necessarily slowas the two-part nut F is within the pinion e and contains the thread for engaging the thread of the spindle which by this means is advanced in the direction of the feed, the said not also turning in the same direction as said pinion and spindle. In "view of the'foregoing theforward movement of the spindle will be onethird less than if pinion e carrying the twopart nut was stationary. The method just described is the one used when the substance operated upon is hard and a slow feed is required.

To increase the speedI loosen the binding screw b and move wheel I) to one side out of engagement with pinion e and insert pin 6? in the opening in said pinion to prevent the latter from turning. In this way the advance or feed of the spindle will be increased one-third. It is obvious that by having a number of holes in side bars of frame B for insertion of pin 6', the carriage E may be moved to enable the use of a larger gear wheel than the one shown at b, by the use of which the feed may be further varied.

Fromwhat has been said it will be seen that my invention is simple and durable and positive in its action. It will further be seen that the machine comprises but few parts and will not become easily deranged.

I claim as my invention- 1. A drilling machine comprising the supporting frame, the frame adj ustably supported thereby, the gear-wheels and pinions mounted in said latter frame, one of said pinions being hollow and having grooves in its interior surface, a two-part nut having splines fitting in said grooves, the spindle in engagement with said two-part nut, the boring tool,

means for imparting motion to said gear-' wheels and pinions, and means, substantially as described, for holding said hollow pinion out of operation, whereby said spindle can be fed forward at an increased rate of speed, as set forth.

2. A drilling machine, comprising the sup ion mounted in said carriage and having interior grooves, the two-part nut having splines or feathers fitting in said grooves, the spindle in engagement with said two-part nut and operated by said gear-wheels and pinions, the boring tool, means for imparting motion to said gear-wheels and pinions, and means for holding saidhollow pinion out of operation, the same comprising a gearwheel with which said hollow pinion engages adj ustably mounted on its bearing, said spindle being thereby capable of being fed forward at an increased rate of speed, substantially as set forth.

3. A drilling machine, comprising the supporting frame, the frame. adj ustably supported thereby, the gear-wheels mounted in the opposite sides of said latter frame, the hollow pinion mounted in one end of said latter'fra'me, the carriage also mounted in said frame and having a hollow pinion mounted therein, the two-part nut having splines or feathers fitting in grooves of said latter hollow pinion, the spindle in engagement with said two-part nut and the first mentioned hollow pinion, the boring tool, means for imparting motion to said gear-wheels and pinions, and means for holding the hollow pinion containing said two-part nut out of operation, the same comprising a gear-wheel with which said pinion engages adj ustably mounted on its bearing, whereby said spindle is capable of being fed forward at an increased rate of speed, substantially as set forth.

4. In a drilling machine, the combination of the frame, the gear-wheels mountedin-opposite sides thereof, the pinion mounted in one end of said frame, the carriage on the opposite end thereof having a hollow pinion mounted therein, the two-part nut having splines, or feathers fitting in grooves of said hollow pinion, the spindle in engagement therewith, means for imparting motion thereto, and 'means for holding said hollow pinion out of operation, the same comprising a gear-wheel with which said hollow pinion engages, adj ustably mounted on its bearing, whereby said spindle is capable of being fed forward at an increased rate of speed, substantially as set forth.

5. A drilling machine, comprising the supporting frame, the frame adjustably supported thereby, the gear wheels mounted on opposite sides thereof, one of said gear-wheels being provided with a set-screw whereby the same may be adjusted to different positions, the pinion mounted in the end of said latter frame having a flange to prevent lateral movement, the carriage also mounted on said frame and having a pinion mounted therein, the pin for preventing the rotation of the latter, the spindle in engagement with said pinions, the boring tool, and means for imparting motion to said gear-wheels and pinions, substantially as set forth.

6. As an improvement in drilling machines, the frame, the frame supported thereby, the shaft mounted in said latter frame, the large gear wheel on one end of said shaft, the small gear wheel adj ustably secured on the opposite end thereof, the hollow pinion mounted in the end of said frame meshing with the larger gear-Wheel, the carriage also mounted on said latter frame, the hollow pinof a hollow pinion having grooves in the volve with said hollow pinion, substantially inner surface, a two-part nut the sections of as set forth. 10 which are hinged together and interior-1y In testimony whereof Iafifix my signature in screw-threaded, said sections being also propresence of two witnesses.

5 vided with splines or feathers fitting in the JEREMIAH SULLIVAN, JR.

grooves of said pinion, and the screw- Witnesses: threaded spindle in engagement with said GEO. BURKE,

two part nut, said nut being designed to re- JOHN RONAN. 

